摘要
为满足高寒地区和机载设备中电子设备对散热装置较宽工作温度的要求,本文提出采用乙醇-水混合物作为环路热管的工质,开展了乙醇浓度对环路热管启动特性和热输运性能影响的研究。实验表明:基于乙醇-水混合工质的环路热管能在低功率下启动,随着工质中乙醇浓度的减小,最小启动功率、启动温度升高,启动性能变差;使用混合工质可以改善环路热管的热输运性能,降低系统热阻,提高最大热负荷。
There is the requirement of wider working temperature range for cooling system of electric devices in the high-cold area and airborne equipment. To meet this requirement, loop heat pipe with binary mixture of water/ethanol was developed in this work. The effects of ethanol concentration on the operating performance in loop heat pipe had been studied experimentally. The results show that the loop heat pipe with binary mixture can star up successfully under low heat power and when the ethanol concentration decreases start-up performance of loop heat pipe worsens with minimum start-up power and start-up temperature increasing. When working fluid with binary mixture of water/ethanol is applied in the loop heat pipe, its thermal resistance decreases and the maxi- mum heat load rises, which indicates that thermal transport performance of loop heat pipe is improved.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2011年第12期2093-2095,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50876033
No.U0834002)
关键词
环路热管
混合工质
启动特性
热输运性能
loop heat pipe
binary mixture
start-up characteristics
thermal transport performance
